janvanwinckel Posted July 29, 2017 Share Posted July 29, 2017 Can someone help me identifying these fossils which we found in Thumama, Saudi? Found them on a fossil hunting trip with my son and we are curious whether they are actually fossils? Link to comment Share on other sites More sharing options...
doushantuo Posted July 29, 2017 Share Posted July 29, 2017 yes,they are fossils,mostly mollusca:bivalves("sea shells"/oyster/clams,etc),an ammonite,possibly a gastropod(snail).possibly a coral,possibly a brachiopod("lamp shell",NOT related to molluscs). Nice finds! Any size indication possible?(ruler?) Link to comment Share on other sites More sharing options...
Doctor Mud Posted July 29, 2017 Share Posted July 29, 2017 The second group look like concretions to me. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted July 29, 2017 Share Posted July 29, 2017 Oops you posted this thread twice, I posted on the other one... here's what I posted: The last picture is geological, maybe concretions. In the first picture you have a few gastropods (snails) and shells, I'm not sure if they are bivalve or brachiopod. The large thing appears to be a horn (rugose) coral or stromatolite? I will do some research as to the age, which should help. I can't find any references to thumama mountain, so can you tell where it is on this map? This will give us the geologic age and should help give firm identifications. Never mind, just found it! Should be Cretaceous in age! Nice finds! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
janvanwinckel Posted July 29, 2017 Author Share Posted July 29, 2017 2 hours ago, doushantuo said: yes,they are fossils,mostly mollusca:bivalves("sea shells"/oyster/clams,etc),an ammonite,possibly a gastropod(snail).possibly a coral,possibly a brachiopod("lamp shell",NOT related to molluscs). Nice finds! Any size indication possible?(ruler?) Link to comment Share on other sites More sharing options...
janvanwinckel Posted July 29, 2017 Author Share Posted July 29, 2017 50 minutes ago, WhodamanHD said: Oops you posted this thread twice, I posted on the other one... here's what I posted: The last picture is geological, maybe concretions. In the first picture you have a few gastropods (snails) and shells, I'm not sure if they are bivalve or brachiopod. The large thing appears to be a horn (rugose) coral or stromatolite? I will do some research as to the age, which should help. I can't find any references to thumama mountain, so can you tell where it is on this map? This will give us the geologic age and should help give firm identifications. Never mind, just found it! Should be Cretaceous in age! Nice finds! Link to comment Share on other sites More sharing options...
janvanwinckel Posted July 29, 2017 Author Share Posted July 29, 2017 I uploaded some individual photos. I found these fossils in Thumamah national park 80km north of Riyadh. On the slopes of Thumamah mountains. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted July 29, 2017 Share Posted July 29, 2017 7 minutes ago, janvanwinckel said: Yes this is what I thought, either Jurassic or Cretaceous. It looks like you have a partial echnoderm (sanddollar) and a cross section of a horn coral as well, cool finds! 3 minutes ago, janvanwinckel said: I uploaded some individual photos. I found these fossils in Thumamah national park 80km north of Riyadh. On the slopes of Thumamah mountains. Keep looking, you have a chance of finding large vertebrates like icthyosaurs, mosasaurs, and even a small chance to get dinosaur bones! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
janvanwinckel Posted July 29, 2017 Author Share Posted July 29, 2017 1 hour ago, Doctor Mud said: The second group look like concretions to me. Any idea about the other fossils? Link to comment Share on other sites More sharing options...
abyssunder Posted July 30, 2017 Share Posted July 30, 2017 These ones are internal mold fragments of gastropods similar to Campanile or Cimolithium. document in this topic " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
abyssunder Posted July 30, 2017 Share Posted July 30, 2017 This one is an oyster, similar to Actinostreon. excerpt from W. Kiessling et al. / Journal of African Earth Sciences 59 (2011) 195–214, document here " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
abyssunder Posted July 30, 2017 Share Posted July 30, 2017 This one has an echinoid fragment, showing the "petals". picture from here " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
abyssunder Posted July 30, 2017 Share Posted July 30, 2017 (edited) This could be a solitary sleractinian coral in the matrix, showing the arrangement of septa. picture from here excerpt from George D. Stanley Jr. 2003. The evolution of modern corals and their early history. Earth-Science Reviews 60:195–225 Edited July 30, 2017 by abyssunder " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
abyssunder Posted July 30, 2017 Share Posted July 30, 2017 This strange one might be a sponge/stromatoporoid. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
abyssunder Posted January 1, 2022 Share Posted January 1, 2022 Was this topic missed or the posters were wrong? (Just find it searching my older posts) " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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